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Add TaprootSpendData data structure, equivalent to script map for P2[W]SH

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This data structures stores all information necessary for spending a taproot
output (the internal key, the Merkle root, and the control blocks for every
script leaf).

It is added to signing providers, and populated by the tr() descriptor.
This commit is contained in:
Pieter Wuille 2021-03-03 15:02:56 -08:00
parent b0e5fbf6fa
commit dbb0ce9fbf
6 changed files with 109 additions and 7 deletions
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4
src/script/descriptor.cpp
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@ -843,7 +843,9 @@ protected:
XOnlyPubKey xpk(keys[0]);
if (!xpk.IsFullyValid()) return {};
builder.Finalize(xpk);
return Vector(GetScriptForDestination(builder.GetOutput()));
WitnessV1Taproot output = builder.GetOutput();
out.tr_spenddata[output].Merge(builder.GetSpendData());
return Vector(GetScriptForDestination(output));
}
bool ToStringSubScriptHelper(const SigningProvider* arg, std::string& ret, bool priv, bool normalized) const override
{